package base;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class CharacterEncodingFilter implements Filter {

	private String characterEncoding;
	private boolean enabled;

	@Override
	public void init(FilterConfig config) throws ServletException {

		characterEncoding = config.getInitParameter("characterEncoding");

		enabled = "true".equalsIgnoreCase(characterEncoding.trim())
				|| "1".equalsIgnoreCase(characterEncoding.trim());
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
			if (enabled || characterEncoding != null) 
			{
				request.setCharacterEncoding(characterEncoding);
				response.setCharacterEncoding(characterEncoding);
			}
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		characterEncoding = null;
	}
}
